I had similar issue. I have bitdefender AV suite. I have disabled the bit defender firewall and enabled windows firewall. I am not 100% sure, but I think the firewall (bitdefender) was the main culprit. Hope this helps.

Hi everyone,Two years passed and I still experience the problem.It made me to basically renounce to Chesscube, but I do like the site, and I give it a try from time to time.What I can tell is that:1. It occurs in/with different places/countries/routers/Internet providers/computers.2. It is not permanent. Sometimes one can play 60 minutes without problem, then there are days in which the engine restarts every 15 seconds or so. What is permanent with it is that it is recurring, and it is unpredictable.3. It does not seem to be related to an specific Microsoft OS (I have experimented same symptoms on both XP and Win7/64).4. I use BitDefender (on all systems that I have tried to use Chesscube), I did not disabled the firewall, and I see no reason to disable it (However, as someone reported bellow it seems to be unrelated to BitDefender)5. I use Chrome, but I remember that I have tested and it also reproduces on Firefox.

agame between me (subhashkale=white,and Adrain49=black played on dt.4th july,game was disconnected from black.and then reconnected. white was having time leftwas 8min.and black 1min.51sec. itwas black"s turn to play. suddenly white was forfeited on time. how this happened? pl. help.

agame between me (subhashkale=white,and Adrain49=black played on dt.4th july,game was disconnected from black.and then reconnected. white was having time leftwas 8min.and black 1min.51sec. itwas black"s turn to play. suddenly white was forfeited on time. how this happened? pl. help.